Resin Wheels

Red resin wheels occupy the critical middle stage in glass edge processing — they bridge the gap between the aggressive material removal of diamond wheels and the surface refinement of polishing compounds. The red resin matrix uses a fine-grit aluminum oxide abrasive (typically #400–#600) bonded in a heat-resistant phenolic resin. This combination delivers controlled, uniform material removal that eliminates the deep scratches left by diamond wheels without introducing new defects. The resin bond is softer than metal bonds, which means it wears progressively and self-dresses during use, maintaining consistent cutting action throughout the wheel's life. For double edger operations, red resin wheels are the first step after the diamond grinding stage — they reduce surface roughness from Ra 2–5μm down to Ra 0.5–1.0μm, creating the ideal surface for cerium oxide or felt-wheel polishing. Hanwin's red resin wheels use a proprietary resin formulation that maintains consistent hardness across operating temperatures, preventing the 'hardening' effect that causes glazing in lesser wheels. Each wheel is precision-molded and dynamically balanced to eliminate vibration that causes uneven polishing.

Green resin wheels are the Swiss Army knife of glass edge processing. With a medium-grit abrasive (#240–#400) in a balanced phenolic resin matrix, they handle a wider range of applications than any other resin wheel type. The green resin formulation strikes the optimal balance between material removal rate and surface finish quality — aggressive enough to remove moderate stock and blend diamond wheel marks, yet refined enough to leave a surface that transitions smoothly to polishing. For operations that process varied glass thicknesses and types daily, green resin wheels provide the flexibility to handle everything from 3mm shower glass to 19mm structural panels without wheel changes. The medium-density resin bond wears at a predictable, linear rate — operators can visually monitor wheel wear and plan replacements proactively. Hanwin's green resin wheels use a heat-stabilized resin that maintains consistent performance from cold start to extended production runs. The wheel's cooling channels — molded into the resin during manufacturing — direct coolant flow across the full contact surface, preventing thermal buildup that causes edge chipping.

Black-sand resin wheels are built for one purpose: removing material fast. The black-sand designation comes from the silicon carbide (SiC) abrasive — darker and harder than aluminum oxide — embedded in a tough, wear-resistant resin matrix. Where red and green resin wheels prioritize surface finish, black-sand wheels prioritize material removal rate. The coarse SiC grit (#80–#180) cuts through glass at 2–3× the rate of finer resin wheels, making it the go-to choice for operations that need to remove significant stock — chamfering thick glass edges, roughing bevel profiles, or processing glass that will be further refined by downstream polishing. The silicon carbide abrasive is particularly effective on hard-coated glass (Low-E, solar control) where aluminum oxide grit tends to load and glaze. SiC's sharper, harder crystals maintain cutting action even on coated surfaces. Hanwin's black-sand wheels use a high-density resin bond that resists the increased thermal and mechanical loads of coarse grinding. The bond is formulated to release spent SiC crystals progressively, exposing fresh cutting edges throughout the wheel's life. For operations running thick glass (12mm+) or hard-coated architectural panels, black-sand wheels deliver the throughput that finer resin wheels cannot match.